Cedar District Formation (British Columbia, Washington)
Chico Formation (Ten Mile Member) (CA)
Williams Formation (Pleasants Sandstone) (CA)
Williams Ladd Formation (Schulz Ranch Sandstone) (CA)
Santonian
Chico Formation (Musty Buck Member) (CA)
Atira ornatissima from the Chico Formation of California (LACMIP 10711.61).Atira ornatissima from the Chico Formation of California (LACMIP 10711.61).Atira ornatissima from the Chatsworth Formation of California (LACMIP 26994.13).